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2 Fa'ato'aga fa'au'u vili fa'aaogā 0.8 saito fa'aulufale mai WC pa'u ma fa'aulufale fa'atatau TiAIN + TiSiN u'amea tu'ufa'atasi, talafeagai mo HRC55°/HRC56°/HRC58°/HRC60°/HRC62/°HRC65° uamea, alumini ma lafo u'amea ma isi u'amea.